With the Salifert Profi Test I² you can determine the iodine content in seawater exactly and easily. Iodine is present in natural seawater in a very low concentration. Iodine occurs as different species. Some of them are iodide, iodate and hypoiodite. Generally when we say iodine then we mean one or more iodine species without a clear distinction being made. Natural seawater contains predominantly iodate and to a slight extent iodide. There is however a misconception among many hobbyists that iodide predominates in natural seawater. This is however false. Test kits which are not capable in detecting iodate might not really be suitable for aquarium use. Since in an aquarium iodide can be transferred to iodate. This means that if a test kit is used not capable in detecting iodate, a false low total iodine concentration (sum of iodate and iodide) will be obtained and the iodate concentration can climb far too high and possibly upsetting the aquarium environment. The Salifert Profi Test Iodine measures all naturally occurring iodine species such as iodate, iodide, molecular iodine and hypoiodite. No other test kit offers this possibility. Sufficient for approx. 40 tests in seawater aquaria.Do you have questions about this article ?